WO1996014058A1 - Formulations opioides administrables par voie orale et obtenues par fusion-extrusion - Google Patents

Formulations opioides administrables par voie orale et obtenues par fusion-extrusion Download PDF

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Publication number
WO1996014058A1
WO1996014058A1 PCT/US1995/014745 US9514745W WO9614058A1 WO 1996014058 A1 WO1996014058 A1 WO 1996014058A1 US 9514745 W US9514745 W US 9514745W WO 9614058 A1 WO9614058 A1 WO 9614058A1
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WO
WIPO (PCT)
Prior art keywords
hours
formulation
release
active agent
opioid
Prior art date
Application number
PCT/US1995/014745
Other languages
English (en)
Inventor
Benjamin Oshlack
Mark Chasin
Hua-Pin Huang
David Sackler
Original Assignee
Euro-Celtique, S.A.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=23306123&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=WO1996014058(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Priority to KR1019970702984A priority Critical patent/KR100232945B1/ko
Priority to DE69532415T priority patent/DE69532415T3/de
Priority to EP95939928A priority patent/EP0785775B2/fr
Priority to DK04012331T priority patent/DK1449531T3/da
Priority to DK04012330T priority patent/DK1449530T3/da
Priority to DK95939928.8T priority patent/DK0785775T4/da
Priority to JP51553796A priority patent/JP3186064B2/ja
Application filed by Euro-Celtique, S.A. filed Critical Euro-Celtique, S.A.
Priority to CA002204180A priority patent/CA2204180C/fr
Priority to AU41570/96A priority patent/AU705894B2/en
Priority to DK06123277T priority patent/DK1741426T3/da
Priority to AT95939928T priority patent/ATE257375T1/de
Publication of WO1996014058A1 publication Critical patent/WO1996014058A1/fr
Priority to US08/833,948 priority patent/US5958452A/en
Priority to US09/360,056 priority patent/US6261599B1/en
Priority to US09/777,616 priority patent/US6743442B2/en
Priority to US10/242,174 priority patent/US20030190358A1/en
Priority to US10/664,602 priority patent/US20050089568A1/en
Priority to US10/690,389 priority patent/US20040081694A1/en
Priority to US12/722,974 priority patent/US20100172974A1/en

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K9/00—Medicinal preparations characterised by special physical form
    • A61K9/14—Particulate form, e.g. powders, Processes for size reducing of pure drugs or the resulting products, Pure drug nanoparticles
    • A61K9/16—Agglomerates; Granulates; Microbeadlets ; Microspheres; Pellets; Solid products obtained by spray drying, spray freeze drying, spray congealing,(multiple) emulsion solvent evaporation or extraction
    • A61K9/1605—Excipients; Inactive ingredients
    • A61K9/1629—Organic macromolecular compounds
    • A61K9/1635—Organic macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polyvinyl pyrrolidone, poly(meth)acrylates
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K9/00—Medicinal preparations characterised by special physical form
    • A61K9/14—Particulate form, e.g. powders, Processes for size reducing of pure drugs or the resulting products, Pure drug nanoparticles
    • A61K9/16—Agglomerates; Granulates; Microbeadlets ; Microspheres; Pellets; Solid products obtained by spray drying, spray freeze drying, spray congealing,(multiple) emulsion solvent evaporation or extraction
    • A61K9/1605—Excipients; Inactive ingredients
    • A61K9/1617—Organic compounds, e.g. phospholipids, fats
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K9/00—Medicinal preparations characterised by special physical form
    • A61K9/14—Particulate form, e.g. powders, Processes for size reducing of pure drugs or the resulting products, Pure drug nanoparticles
    • A61K9/16—Agglomerates; Granulates; Microbeadlets ; Microspheres; Pellets; Solid products obtained by spray drying, spray freeze drying, spray congealing,(multiple) emulsion solvent evaporation or extraction
    • A61K9/1605—Excipients; Inactive ingredients
    • A61K9/1629—Organic macromolecular compounds
    • A61K9/1652—Polysaccharides, e.g. alginate, cellulose derivatives; Cyclodextrin
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K9/00—Medicinal preparations characterised by special physical form
    • A61K9/14—Particulate form, e.g. powders, Processes for size reducing of pure drugs or the resulting products, Pure drug nanoparticles
    • A61K9/16—Agglomerates; Granulates; Microbeadlets ; Microspheres; Pellets; Solid products obtained by spray drying, spray freeze drying, spray congealing,(multiple) emulsion solvent evaporation or extraction
    • A61K9/1682—Processes
    • A61K9/1694—Processes resulting in granules or microspheres of the matrix type containing more than 5% of excipient
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K9/00—Medicinal preparations characterised by special physical form
    • A61K9/20—Pills, tablets, discs, rods
    • A61K9/2004—Excipients; Inactive ingredients
    • A61K9/2013—Organic compounds, e.g. phospholipids, fats
    • A61K9/2018—Sugars, or sugar alcohols, e.g. lactose, mannitol; Derivatives thereof, e.g. polysorbates
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K9/00—Medicinal preparations characterised by special physical form
    • A61K9/20—Pills, tablets, discs, rods
    • A61K9/2004—Excipients; Inactive ingredients
    • A61K9/2022—Organic macromolecular compounds
    • A61K9/2027—Organic macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polyvinyl pyrrolidone, poly(meth)acrylates
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K9/00—Medicinal preparations characterised by special physical form
    • A61K9/20—Pills, tablets, discs, rods
    • A61K9/2072—Pills, tablets, discs, rods characterised by shape, structure or size; Tablets with holes, special break lines or identification marks; Partially coated tablets; Disintegrating flat shaped forms
    • A61K9/2077—Tablets comprising drug-containing microparticles in a substantial amount of supporting matrix; Multiparticulate tablets
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K9/00—Medicinal preparations characterised by special physical form
    • A61K9/20—Pills, tablets, discs, rods
    • A61K9/2072—Pills, tablets, discs, rods characterised by shape, structure or size; Tablets with holes, special break lines or identification marks; Partially coated tablets; Disintegrating flat shaped forms
    • A61K9/2077—Tablets comprising drug-containing microparticles in a substantial amount of supporting matrix; Multiparticulate tablets
    • A61K9/2081—Tablets comprising drug-containing microparticles in a substantial amount of supporting matrix; Multiparticulate tablets with microcapsules or coated microparticles according to A61K9/50
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K9/00—Medicinal preparations characterised by special physical form
    • A61K9/20—Pills, tablets, discs, rods
    • A61K9/2095—Tabletting processes; Dosage units made by direct compression of powders or specially processed granules, by eliminating solvents, by melt-extrusion, by injection molding, by 3D printing
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P25/00—Drugs for disorders of the nervous system
    • A61P25/04—Centrally acting analgesics, e.g. opioids
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P29/00—Non-central analgesic, antipyretic or antiinflammatory agents, e.g. antirheumatic agents; Non-steroidal antiinflammatory drugs [NSAID]
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B9/00—Making granules
    • B29B9/02—Making granules by dividing preformed material
    • B29B9/06—Making granules by dividing preformed material in the form of filamentary material, e.g. combined with extrusion
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K9/00—Medicinal preparations characterised by special physical form
    • A61K9/14—Particulate form, e.g. powders, Processes for size reducing of pure drugs or the resulting products, Pure drug nanoparticles
    • A61K9/141—Intimate drug-carrier mixtures characterised by the carrier, e.g. ordered mixtures, adsorbates, solid solutions, eutectica, co-dried, co-solubilised, co-kneaded, co-milled, co-ground products, co-precipitates, co-evaporates, co-extrudates, co-melts; Drug nanoparticles with adsorbed surface modifiers
    • A61K9/145—Intimate drug-carrier mixtures characterised by the carrier, e.g. ordered mixtures, adsorbates, solid solutions, eutectica, co-dried, co-solubilised, co-kneaded, co-milled, co-ground products, co-precipitates, co-evaporates, co-extrudates, co-melts; Drug nanoparticles with adsorbed surface modifiers with organic compounds

Definitions

  • the present invention relates to the use of melt extrusion technology in the production of bioavailable sustained-release matrix pharmaceutical formulations.
  • melt extrusion has been used in the production of immediate release formulations.
  • compositions which provide for controlled release of pharmacologically active substances contained in the compositions after oral administration to humans and animals.
  • Such slow release compositions are used to delay absorption of a medicament until it has reached certain portions of the alimentary tract.
  • sustained-release of a medicament in the alimentary tract further maintains a desired concentration of said medicament in the blood stream for a longer duration than would occur if conventional rapid release dosage forms are administered.
  • sustained release formulations including specially coated pellets, coated tablets and capsules wherein the slow re ⁇ lease of the active medicament is brought about through selective breakdown of the coating of the preparation or through compounding with a special matrix to affect the release of a drug.
  • Some sustained release formulations provide for related sequential release of a single dose of an active compound at predetermined periods after administration
  • sustained-release preparations It is the intent of all sustained-release preparations to provide a longer period of pharmacologic response after the administration of the drug and is ordinarily experienced after the administration of the rapid release dosage forms. Such longer periods of response provide for many inherent therapeutic benefits that are not achieved with corresponding short acting, immediate release preparations. This is especially true in the treatment of cancer patients or other patients in need of treatment for the alleviation of moderate to severe pain, where blood levels of an opioid analgesic medicament must be maintained at a therapeutically effective level to provide pain relief. Unless conventional rapid acting drug therapy is carefully administered at frequent intervals to maintain effective steady state blood levels of the drug, peaks and valleys in the blood level of the active drug occur because of the rapid absorption, systemic excretion of the compound and through metabolic inactivation. thereby producing special problems in maintenance of analgesic efficacy
  • compositions providing the sustained-release of an active compound from a carrier is basicalK concerned with the release of the active substance into the physiologic fluid of the ahmentar. tract How- ever, it is generally recognized that the mere presence ⁇ an ac in the gastrointestinal fluids does not, by itself, insure b ⁇ oa ⁇ a ⁇ lab ⁇ l ⁇ t ⁇
  • the active drug substance In order to be absorbed, the active drug substance must be in solution
  • the time required for a given proportion of an active substance from a unit dosage form is determined as the proportion of the amount of active drug substance released from a unit dosage form over a specified time base by a test method conducted under standardized conditions.
  • the physiologic fluids of the gastrointestinal tract are the media for determining dissolution time.
  • the present state of the art recognizes many satisfactory test procedures to measure dissolution time for pharmaceutical compo- sitions, and these test procedures are described in official compendia world wide. Although there are many diverse factors which influence the dissolution of drug substance from its carrier, the dissolution time determined for a pharmacologically active substance from the specific composition is relatively constant and reproducible.
  • the dissolution concentration of an active drug substance is dynamically modified in its steady state as components are removed from the dissolution medium through abso ⁇ tion across the tissue site.
  • the saturation level of the dissolved materials is replenished from the dosage form reserve to maintain a relatively uniform and constant dissolution concentration in the solvent medium providing for a steady state absorption.
  • the transport across a tissue abso ⁇ tion site of the gastrointestinal tract is influenced by the Donnan osmotic equilibrium forces on both sides of the membrane since the direction of the driving force is the difference between the concentrations of active substance on either side of the membrane, i.e., the amount dissolved in the gastrointestinal fluids and the amount present in the blood. Since the blood levels are constantly being modified by dilution, circulatory changes, tissue storage, metabolic conversion and systemic excretion, the flow of active materials is directed from the gastrointestinal tract into the blood stream.
  • melt granulation techniques have also been suggested to provide controlled release formulations. Generally, melt granulation involves mechanically working an active ingredient in paniculate form with one or more suitable binders and/or pharmaceutically acceptable excipients in a mixer until one or more of the binders melts and adheres to the surface of the paniculate, eventually building up granules.
  • U.S. Patent No. 4,957,681 discloses a continuous process for preparing pharmaceutical mixtures having at least two components which are continuously metered. The process includes continuously metering the individual components of the pharmaceutical mixture at a rate of at least 50 g/h on electronic differential metering balances having a metering accuracy of at least ⁇ 5% within time intervals of less than one minute and, additionally, having screw conveyors, thereby obtaining a substantially uniformly metered mixture; and shaping the mixture.
  • Example 1 of the '681 patent is representative of the process The requisite amounts of a copolymer having a K value of 30 and obtained from 60% of N-vinylpyrroIid-2-one
  • NTP stearyl alcohol
  • stearyl alcohol stearyl alcohol
  • theophylline are metered via three metering balances into the hopper of an extruder and extruded
  • the temperatures of the extruder cylinder consisting of six shots ranged from 30-60°C and the die is heated to 100°C
  • the resultant extrudate is then pressed into tablets of the required shape
  • the '681 patent does not disclose preparation of sustained release opioid pharmaceutical formulations
  • the polymers used were ethylcellulose, a copolymer of ehtyl acrylate and methyl methacrylate containing quaternary ammonium groups, cellulose acetate butyrate, poly( vinyl chloride-co-vinyl acetate) and a copolymer of ethylene and vinyl acetate.
  • some plasticizers were used.
  • WO 93/07859 describes drug loaded pellets produced through melt spheronization wherein the therapeutically active agent is blended with various excipoients and binders; the formulation is fed to an extruder where it is heated and extruded at a speed of about 0.05 to 10 mm/sec. at approximately 60-180° C. The extrudate is then cut into pieces in a pelletizer and subsequently fed to a spheronizer for uniform pellet formulation.
  • the present invention is related in part to the su ⁇ rising discovery that sustained-release oral opioid analgesic formulations may be prepared utilizing melt extrusion techniques to provide bioavailable unit dose products which provide analgesia in a patient for, e.g., 8 - 24 hours..
  • the invention is also related in part to a new melt-extruded oral sustained- release dosage forms which comprise a pharmaceutically acceptable hydrophobic material, a retardant selected from waxes, fatty alcohols, and fatty acids, and a drug.
  • one aspect of the present invention is related to a pharmaceutical extrudate including an opioid analgesic dispersed in a matrix.
  • the extrudate is strand or spaghetti-shaped and has a diameter from about
  • the extrudate is divided into unit doses of the opioid analgesic for oral administration to a patient, and provides a sustained analgetic effect for 8-24 hours or more.
  • the matrices preferably include a hydrophobic material and a second retardant material (preferably a hydrophobic fusible carrier) which acts to further slow or control the release of the therapeutically active agent when the formulation is exposed to aqueous solutions in-vitro, or exposed to gastic and/or intestinal fluids.
  • a hydrophobic material preferably a hydrophobic fusible carrier
  • the hydrophobic material is selected from the group consisting of alkylcelluloses, acrylic and methacrylic acid polymers and copolymers, shellac, zein, hydrogenated castor oil or hydrogenated vegetable oil, or mixtures thereof.
  • the retardant material is preferably selected from natural and synthetic waxes, fatty acids, fatty alcohols and mixtures of the same. Examples include beeswax and carnauba wax, stearic acid, and stearyl alcohol. This list is of course not meant to be exclusive.
  • the extrudate may be cut into multiparticulates by any cutting means known in the art.
  • the multiparticulates have a length of from about 0.1 to 5 mm in length.
  • the multiparticulates may then be divided into unit doses such that each individual unit dose includes a dose of opioid analgesic sufficient to provide analgesia to a mammal, preferably a human patient.
  • the unit doses of multiparticulates may then be incorporated into a solid pharmaceutical dosage formulation, e.g. via compression or shaping into tablets, by placing a requisite amount inside a gelatin capsule, or by forming the extruded product into the form of a suppository.
  • the pharmaceutical extrudates of the present invention may be prepared by blending the drug together with all matrix ingredients (hydrophobic material, binder and any additional (optional) excipients), feeding the resultant mixture into an extruder heated to the requisite temperature necessary to soften the mixture sufficiently to render the mixture extrudable; extruding the viscous, heated mass as a spaghetti-like strand; allowing the extrudate to congeal and harden, and then dividing the strand into desired pieces.
  • This may be accomplished, e.g., by cutting the strands into pellets of 1.5 mm in diameter and 1.5 mm in length.
  • the extrudate has a diameter of from about 0.1 to about 5 mm and provides sustained release of said opioid analgesic for a time period of from about 8 to about 24 hours.
  • Another aspect of the invention is directed to pharmaceutical dosage forms including the extrudate prepared as outlined above.
  • the extrudate is cut into multiparticulates using any cutting means known in the art, e.g a blade.
  • the multiparticulates are then divided into unit doses containing an effective amount of opioid analgesic to provide analgesia or pain relief in a human patient over the desired dosing interval.
  • the unit dose of multiparticulates may then be inco ⁇ orated into tablets, e.g. via direct compression, formed into suppositories, or encapsulated by any means known in the art.
  • a method of treating a patient with sustained-release formulations prepared as described above includes administering a dosage form containing the novel extrudate to a patient in need of opioid analgesic therapy.
  • a unit dose is understood to contain an effective amount of the therapeutically active agent to produce pain relief and/or analgesia to the patient.
  • opioid analgesic administered to a patient will vary due to numerous factors; e.g. the specific opioid analgesic(s) being administered, the weight and tolerance of the patient, other therapeutic agents concomitantly being administered, etc.
  • the dosage form in order for q dosage form to be effective for its intended purpose, the dosage form must be bioavailable.
  • bioavailable is defined as the total amount of a drug substance that is absorbed and available to provide the desired therapeutic effect after administration of a unit dosage form.
  • bioavailability of a given dosage form is determined by comparison to a known reference drug product, as commonly determined and accepted by Governmental Regulatory Agencies, such as the United States FDA.
  • bioavailability is defined for purposes of the present invention as the extent to which the drug (e.g., opioid analgesic) is absorbed from the unit dosage form and is available at the site of drug action.
  • drug e.g., opioid analgesic
  • sustained release is defined for purposes of the present invention as the release of the drug (e.g., opioid analgesic) at such a rate that blood (e.g., plasma) levels are maintained within the therapeutic range but below toxic levels over a period of time greater than 8 hours, more preferably for about 12 to about 24 hours, or longer.
  • drug e.g., opioid analgesic
  • blood e.g., plasma
  • unit dose is defined for purposes of the present invention as the total amount of multiparticulates needed to administer a desired dose of therapeutically active agent (e.g., opioid analgesic) to a patient.
  • therapeutically active agent e.g., opioid analgesic
  • extrudates of the present invention preferably permit release of the opioid (or salts thereof) over a sustained period of time in an aqueous medium.
  • aqueous medium is defined for pu ⁇ oses of the present invention as any water- containing medium, e.g water, pharmaceutically acceptable dissolution medium, gastric fluid and/or intestinal fluid and the like.
  • Figure 1 is a graph displaying the dissolution results of Examples 1 and 2,
  • Figure 2 is a graph displaying the dissolution rates of Examples 3-6
  • Figures 3 and 4 are graphs displaying the pH dependency of the dissolution results of Examples 3 and 6 respectively
  • Figure 5 is a graph displaying the dissolution results of Examples 7 and 8 vs Example 6;
  • Figure 6 is a graph displaying the dissolution results of Examples 9 and 10;
  • Figure 7 is a graph displaying the dissolution results of Examples 1 1 and 12;
  • Figure 8 is a graph displaying the dissolution results of Examples 15 and 16;
  • Figure 9 is a schematic representation of a system for carrying out the present invention;
  • Figure 10 is a graph displaying the fed/fast bioavailability results for Example 20;
  • Figure 1 1 is a graph displaying the plasma mo ⁇ hine concentrations of Example 21 obtained from administration of the capsules from Example 6 vs. MS Contin ®;
  • Figure 12 is a graph displaying the plasma oxycodone concentrations of
  • Example 22 obtained from administrating the capsules from Examples 1 1 and 13 vs. OxyContin ®;
  • Figure 13 is a graphical representation of the plasma oxycodone concentrations of Example 14;
  • Figure 14 is a graphical representation of the hydromorphone concentrations of
  • Example 24 using the capsules from Example 17 vs. Dilaudid®,
  • Figure 15 is a graph displaying the plasma hydromorphone concentrations of Example 24 using capsules from Example 18 vs. Dilaudid® ;
  • Figure 16 is a graph of the steady-state plasma hydromorphone concentrations of Example 25 using the capsules of Example 17.
  • Figure 17 is a graph of the plasma hydromorphone concentrations of Example 26 using the capsules of Example 19.
  • the sustained-release dosage forms comprise an opioid analgesic as the therapeutically active agent.
  • the drug is incorporated into a melt-extruded strand which includes a pharmaceutically acceptable hydrophobic material such as an alkylcellulose or an acrylic polymer or copolymer.
  • a plasticizer for the hydrophobic material in order to reduce the extrusion temperature.
  • the choice of the most suitable plasticizer is made based on its ability to lower the glass transition temperature (Tg) of the polymer.
  • a hydrophobic fusible carrier (which may also act as a binder) is utilized instead of a plasticizer.
  • the hydrophobic fusible carrier preferably imparts a slower release of the therapeutically active agent from the melt extruded formulation. Any further pharmaeutical excipients known to those skilled in the art may be added as deemed necessary.
  • Another aspect of the invention is directed to improved melt extruded matrices which comprise a hydrophobic material and a fatty binder such as previously specified.
  • a therapeutically active agent is combined with one or more suitable hydrophobic materials and a hydrophobic fusible carrier is extruded to form an extrudate.
  • the extrudate may then be cut into multiparticulates which are subsequently incorporated into sustained release dosage forms.
  • Therapeutically active agents which may be used in accordance with the present invention include both water soluble and water insoluble drugs.
  • therapeutically active agents include antihistamines (e.g., dimenhydrinate, diphenhydramine, chlorpheniramine and dexchlorpheniramine maleate), analgesics (e.g., aspirin, codeine, morphine, dihydromorphone, oxycodone, etc.), non-steroidal anti-inflammatory agents (e.g., naproxen, diclofenac, indomethacin, ibuprofen, sulindac), anti-emetics (e.g., metoclopramide, methylnaltrexone), anti-epileptics (e g , phenytoin, meprobamate and nitrazepam), vasodilators (e.g., nifedipine, papaverine, diltiazem and nicardipine), anti-tussive
  • antacids e.g. atropine, scopolamine
  • antidiabetics e.g., insulin
  • diuretics e.g., ethacrynic acid, bendrofluthiazide
  • anti-hypotensives e.g., propranolol, clonidine
  • antihypertensives e.g., propranolol, clonidine
  • bronchodilators e.g., albuterol
  • steroids e.g., hydrocortisone, triamcinolone, prednisone
  • antibiotics e.g., tetracycline
  • antihemorrhoidals hypnotics, psychotropics, antidiarrheals, mucolytics, sedatives, decongestants, laxatives
  • vitamins stimulants (including appetite suppressants such as phenylpropanolamine), as well as salts, hydrates, and solvates of the same.
  • the opioid analgesics used in accordance with the present invention include alfentanil, allylpro- dine, alphaprodine, anileridine, benzylmo ⁇ hine, bezitramide, bupreno ⁇ hine, buto ⁇ hanol, clonitazene, codeine, cyclazocine, desomo ⁇ hine, dextromoramide, dezocine, diampromide, dihydrocodeine, dihydromo ⁇ hine, dimenoxadol, dimephep- tanol, dimethylthiambutene, dioxaphetyl butyrate, dipipanone, eptazocine, etho- heptazine, ethylmethylthiambutene, ethylmo ⁇ hine, etonitazene fentanyl, heroin, hydrocodone, hydromo ⁇ hone,
  • the opioid analgesic is selected from morphine, codeine, hydromorphone, hydrocodone, oxycodone, dihydrocodeine, dihydromorphine, oxymorphone, tramadol or mixtures thereof.
  • the sustained-release opioid oral dosage form of the present invention includes hydromorphone as the therapeutically active ingredient in an amount from about 4 to about 64 mg hydromorphone hydrochloride.
  • the dosage form may contain molar equivalent amounts of other hydro ⁇ morphone salts or of the hydromorphone base.
  • the opioid analgesic is other than hydromorphone, the dosage form contains an appropriate amount to provide a substantially equivalent therapeutic effect.
  • the sustained-release oral dosage forms of the present invention include from about 5 g to about 800 mg mo ⁇ hine, by weight (based on mo ⁇ hine sulfate).
  • the sustained-release oral dosage forms of the present invention include from about 5 mg to about 400 mg oxycodone.
  • the sustained-release oral dosage forms of the invention include from about 50 mg to about 800 mg tramadol by weight, based on the hydrochloride salt.
  • sustained-release dosage forms of the present invention generally achieve and maintain therapeutic levels substantially without significant increases in the intensity and/or degree of concurrent side effects, such as nausea, vomiting or drowsiness, which are often associated with high blood levels of opioid analgesics. There is also evidence to suggest that the use of the present dosage forms leads to a reduced risk of drug addiction.
  • the oral opioid analgesics have been formulated to provide for an increased duration of analgesic.
  • these formulations at comparable daily dosages of conventional immediate-release drug, are associated with a lower incidence in severity of adverse drug reactions and can also be administered at a lower daily dose than conventional oral medication while maintaining pain control
  • the dosage form may further include one or more additional which may or may not act synergistically with the opioid analgesics of the present invention.
  • additional therapeutically active agents include non-steroidal anti-inflammatory agents, including ibuprofen, diclofenac, naproxen, benoxaprofen, flurbiprofen, fenoprofen, flubufen, ketoprofen, indoprofen, piroprofen, carprofen, oxaprozin, pramoprofen, muroprofen, trioxaprofen, suprofen, aminoprofen, tiaprofenic acid, fluprofen, bucloxic acid, indomethacin, sulindac, tolmetin, zomepirac, tiopinac, zidometacin, acemetacin, fentiazac, clid
  • the additional (non-opioid) therapeutically active agent may be included in controlled release form or in immediate release form.
  • the additional drug may be incorporated into the controlled release matrix along with the opioid; incorporated as a separated controlled release layer or immediate release layer; or may be incorporated as a powder, granulation, etc., in a gelatin capsule with the extrudates of the present invention.
  • the extrudates of the present invention include at least one hydrophobic material.
  • the hydrophobic material will preferably impart sustained release of the opioid analgesic to the final formulation.
  • Preferred hydrophobic materials which may be used in accordance with the present invention include alkylcelluloses such as natural or synthetic celluloses derivatives (e.g. ethylcellulose), acrylic and methacrylic acid polymers and copolymers, shellac, zein, wax-type substances including hydrogenated castor oil or hydrogenated vegetable oil, or mixtures thereof This list is not meant to be exclusive, and any pharmaceutically acceptable hydrophobic material which is capable of imparting sustained release of the active agent and which melts (or softens to the extent necessary to be extruded) may be used in accordance with the present invention.
  • the hydrophobic material is a pharmaceutically acceptable acrylic polymer, including but not limited to acrylic acid and methacrylic acid copolymers, methyl methacrylate, methyl methacrylate copolymers, ethoxyethyl methacrylates, cynaoethyl methacrylate, aminoalkyl methacrylate copolymer, poly(acrylic acid), poly(methacrylic acid), methacrylic acid alkylamine copolymer, poly(methyl methacrylate), poly(methacrylic acid)(anhydride), polymethacrylate, polyacrylamide, poly(methacrylic acid anhydride), and glycidyl methacrylate copolymers.
  • the hydrophobic material is selected from materials such as hydroxyalkylcelluloses such as hydroxypropylmethylcellulose and mixtures of the foregoing.
  • the retardant material is preferably a hydrophobic fusible carrier which may comprise one or more water-insoluble wax-like thermoplastic substances possibly mixed with one or more wax-like thermoplastic substances being less hydrophobic than said one or more water-insoluble wax-like substances
  • the individual wax-like substances in the binder material should be substantially non-degradable and insoluble in gastrointestinal fluids during the initial release phases.
  • Useful water-insoluble wax-like substances may be those with a water- solubility that is lower than about 1 : 5,000 (w/w)
  • Such hydrophobic fusible carrier materials are prekvabK w ter with more or less pronounced hydrophilic and/or hydrophobic uen - .'re-er -t.'i the retardant materials useful in the invention have a mel ⁇ nu point trom about ⁇ 0 to about 200°C, preferably from about 45 to about 90°C
  • the fusible carrier may comprise natural or synthetic waxes , fatty alcohols (such as lauryl, myristyl stearyl, cetyl or preferably cetostearyl entity), fatty acids, including but not limited to fatty acid esters, fatty acid glycerides (mono-, di-, and tri-glycerides), hydrogenated fats, hydrocarbons, normal waxes, stearic aid, stearyl alcohol and hydrophobic and hydrophilic polymers having hydrocarbon backbones.
  • fatty alcohols such as lauryl, myristyl stearyl, cetyl or preferably ceto
  • Suitable waxes include, for example, beeswax, glycowax, castor wax and carnauba wax.
  • a wax-like substance is defined as any material which is normally solid at room temperature and has a melting point of from about 30 to about 100°C.
  • Suitable hydrophobic fusible carrier materials which may be used in accordance with the present invention include digestible, long chain (C g .C 50 , especially C ⁇ -C ⁇ ), substituted or unsubstituted hydrocarbons, such as fatty acids, fatty alcohols, glyceryl esters of fatty acids, mineral and vegetable oils and natural and synthetic waxes. Hydrocarbons having a melting point of between 25° and 90°C are preferred. Of the long chain hydrocarbon materials, fatty (aliphatic) alcohols are preferred in certain embodiments..
  • the oral dosage form may contain up to 60% (by weight) of at least one digestible, long chain hydrocarbon.
  • a sustained-release matrix may also contain suitable quantities of other materials, e.g., diluents, lubricants, binders, granulating aids, colorants, flavorants and glidants that are conventional in the pharmaceutical art The quantities of these additional materials will be sufficient to provide the desired effect to the desired formulation
  • a sustained-release matrix incorporating melt-extruded multiparticulates may also contain suitable quantities of other materials, e.g.
  • diluents lubricants, binders, granulating aids, colorants, flavorants and glidants that are conventional in the pharmaceutical art in amounts up to about 50% by weight of the paniculate if desired
  • pharmaceutically acceptable carriers and excipients that may be used to formulate oral dosage forms are described in the Handbook of Pharmaceutical Excipients. American Pharmaceutical Association (1986), incorporated by reference herein.
  • a process for the preparation of a solid, sustained-release oral dosage form according to the present invention comprising incorporating opioids or a salt thereof in a sustained-release melt-extruded matrix.
  • Incorporation in the matrix may be effected, for example, blending the opioid analgesic, together with at least one hydrophobic material and preferably the additional retardant material (hydrophobic fusible carrier) to obtain a homogeneous mixture.
  • the homogeneous mixture is then heated to a temperature sufficient to at least soften the mixture sufficiently to extrude the same.
  • the resulting homogeneous mixture is then extruded, e.g., using a twin-screw extruder, to form strands.
  • the extrudate is preferably cooled and cut into multiparticulates by any means known in the art.
  • the strands are cooled and cut into multiparticulates.
  • the multiparticulates are then divided into unit doses.
  • the extrudate preferably has a diameter of from about 0.1 to about 5 mm and provides sustained release of the therapeutically active agent for a time period of from about 8 to about 24 hours.
  • An optional process for preparing the melt extrusions, multiparticulates and unit doses of the present invention includes directly metering into an extruder a water- insoluble retardant, a therapeutically active agent, and an optional binder; heating said homogenous mixture; extruding said homogenous mixture to thereby form strands; cooling said strands containing said homogeneous mixture; and cutting said strands into particles having a size from about 0.1 mm to about 12 mm, and dividing said particles into unit doses.
  • a relatively continuous manufacturing procedure is realized.
  • the diameter of the extruder aperture or exit port can also be adjusted to vary the thickness of the extruded strands.
  • the exit part of the extruder need not be round; it can be oblong, rectangular, etc.
  • the exiting strands can be reduced to particles using a hot wire cutter, guillotine, etc.
  • the melt extruded multiparticulate system can be, for example, in the form of granules, spheroids or pellets depending upon the extruder exit orifice.
  • the terms "melt-extruded multiparticulate(s)” and “melt- extruded multiparticulate system(s)” and “melt-extruded particles” shall refer to a plurality of units, preferably within a range of similar size and/or shape and containing one or more active agents and one or more excipients, preferably including a retardant as described herein.
  • the melt-extruded multiparticulates will be of a range of from about 0.1 to about 12 mm in length and have a diameter of from about
  • melt-extruded multipar ⁇ ticulates can be any geometrical shape within this size range such as beads, microspheres, seeds, pellets, etc.
  • a particular advantage provided by the invention is the preparation of sustained-release melt-extruded multiparticulate formulations which do not require further processing, e.g., the extrudate may simply be cut into desired lengths and divided into unit doses of the therapeutically active agent without the need of a spheronization step.
  • oral dosage forms are prepared to include an effective amount of melt-extruded multiparticulates within a capsule.
  • a plurality of the melt-extruded multiparticulates may be placed in a gelatin capsule in an amount sufficient to provide an effective sustained-release dose when ingested and contacted by gastric fluid
  • a suitable amount of the multiparticulate extrudate is compressed into an oral tablet using conventional tableting equipment using standard techniques. Techniques and compositions for making tablets (compressed and molded), capsules (hard and soft gelatin) and pills are also described in Remington's Pharmaceutical Sciences. (Arthur Osol, editor), 1553-1593 (1980), incorporated by reference herein.
  • the extrudate can be shaped into tablets as set forth in U S Patent No 4,957,681 (Klimesch, et al ), described in addtional detail above and hereby incorporated by reference
  • the extrudate can be shaped into suppositories containing a unit dose of the therapeutically active agent This may be accomplished using techniques and equipment well known to those skilled in the art
  • the sustained-release melt-extruded multiparticulate systems or tablets can be coated, or the gelatin capsule can be further coated, with a sustained- release coating comprising one of the hydrophobic materials described above
  • a sustained- release coating comprising one of the hydrophobic materials described above
  • Such coatings preferably include a sufficient amount of hydrophobic material to obtain a weight gain level from about 2 to about 30 percent, although the overcoat may be greater depending upon the physical properties of the particular opioid analgesic compound utilized and the desired release rate, among other things
  • the hydrophobic polymer comprising the sustained-release coating is a pharmaceutically acceptable acrylic polymer, such as those described hereinabove
  • the solvent which is used for the hydrophobic material in the coating may be any pharmaceutically acceptable solvent, including water, methanol, ethanol, methylene chloride and mixtures thereof
  • the unit dosage forms of the present invention may further include combinations of melt-extruded multiparticulates containing one or more of the therapeutically active agents disclosed above before being encapsulated Furthermore, the unit dosage forms can also include an amount of an immediate release therapeutically active agent for prompt therapeutic effect
  • the immediate release therapeutically active agent may be incorporated, e g , as separate pellets within a gelatin capsule, or may be coated on the surface of the compressed tablet which has been prepared from the multiparticulate extrudate as set forth above
  • the controlled-release formulations of the present invention slowly release the therapeutically active agent, e.g., when ingested and exposed to gastric fluids, and then to intestinal fluids.
  • the controlled-release profile of the melt-extruded formulations of the invention can be altered, for example, by varying the amount of retardant, i.e., hydrophobic polymer, by varying the amount of plasticizer relative to hydrophobic polymer, by the inclusion of additional ingredients or excipients, by altering the method of manufacture, etc.
  • the sustained-release dosage forms of the present invention preferably release the therapeutically active agent at a rate that is independent of pH, e.g., between pH 1 6 and 7 2
  • the formulations can be designed to provide a pH-dependent release of the therapeutically active agent.
  • the melt extruded material is prepared without the inclusion of the therapeutically active agent, which is added therafter to the extrudate.
  • Such formulations typically will have the therapeuticalK ac e agent blended together with the extruded matrix material, and then the mixture would be tabletted in order to provide a slow release formulation
  • Such formulations mav be advantageous, for example, when the therapeuticalK active airent ⁇ r ⁇ i_JeJ in the formulation is sensitive to temperatures needed for softenin-. the -H j- o h i material and/ or the retardant material
  • the invention is directed to sustained-release oral opioid formulations which are administrable on a once-a-day basis, and which are prepared from the melt extrudates described herein.
  • dosage forms will provide an in-vitro release (when assessed by the USP Paddle or Basket Method at 100 prm at 900 ml aqueous buffer (pH between 1.6 and 7.2) at 37°C from about 1 to about 42.5% opioid released after one hour, from about 5 to about 65% opioid released after 2 hours, from about 15 to about 85% opioid released after 4 hours, from about 20 to about 90% opioid released after 6 hours, from about 35 to about 95% opioid released after 12 hours, from about 45 to about 100% opioid released after 18 hours, and from about 55 to about 100% opioid released after 24 hours, by weight.
  • Such formulations may further be characterized by a peak plasma level at from about 2 to about 8 hours after oral administration, and preferably from about 4 to about 6 hours after administration.
  • Such formulations are further characterized by a W 50 from about 4 to about 12 hours.
  • the oral 24 hour sustained-release opioid dosage form provides a rapid rate of initial rise in the plasma concentration of the opioid after oral administration, such that the peak plasma level obtained in-vivo occurs from about 2 to about 8 hours after oral administration, and/or the abso ⁇ tion half-life is from about 1 to about 8 hours after oral administration (in the fasted state). More preferably in this embodiment the absorption half-life is 1-6 hours and possibly
  • Such formulations provide an in-vitro dissolution under the conditions specified above, from about 12.5 to about 42.5% opioid released after one hour, from about 25 to about 65% opioid released after 2 hours, from about 45 to about 85% opioid released after 4 hours, and greater than about 60% opioid released after 8 hours, by weight
  • Typical melt extrusion systems capable of carrying-out the present invention include a suitable extruder drive motor having variable speed and constant torque control, start-stop controls, and ammeter
  • the system will include a temperature control console which includes temperature sensors, cooling means and temperature indicators throughout the length of the extruder.
  • the system will include an extruder such as twin-screw extruder which consists of two counter- rotating intermeshing screws enclosed within a cylinder or barrel having an aperture or die at the exit thereof.
  • the feed materials enter through a feed hopper and is moved through the barrel by the screws and is forced through the die into strands which are thereafter conveyed such as by a continuous movable belt to allow for cooling and being directed to a pelletizer or other suitable device to render the extruded ropes into the multiparticulate system
  • the pelletizer can consist of rollers, fixed knife, rotating cutter and the like Suitable instruments and systems are available from distributors such as C W Brabender Instruments, Inc of South hackensack, New Jersey Other suitable apparatus will be apparent to those of ordinary skill in the art
  • a further aspect of the invention is related to the preparation of melt extruded multiparticulates as set forth above in a manner which controls the amount of air included in the extruded product
  • the amount of air included in the extrudate By controlling the amount of air included in the extrudate, it has been surprisingly found that the release rate of the therapeutically active agent from the, e g , multiparticulate extrudate, can be altered significantly
  • the pH dependency of the extruded product can be altered as well
  • the melt extruded product is prepared in a manner which substantially excludes air during the extrusion phase of the process This may be accomplished, for example, by using a Leistritz extruder having a vacuum attachment
  • extruded multiparticulates prepared according to the invention using the Leistritz extruder under vacuum provides a melt- extruded product having different physical characteristics
  • the extrudate is substantially non-porous when magnified, e.g , using a scanning electron microscope which provides an SEM (scanning electron micrograph) Contrary to conventional thought, it has been found that such substantially non-porous formulations provide a faster release of the therapeutically active agent, relative to the same formulation prepared without vacuum.
  • Dissolution Method The following dissolution method was used to obtain dissolution profiles for the dosage forms of Examples 1-25:
  • chlorpheniramine maleate controlled release pellets were prepared according to the above manufacturing procedure using ethylcellulose and an acrylic polymer (Eudragit RSPO), respectively as the retardant.
  • the formulations are set forth in Tables 1 and 2 below. The dissolution of these formulations is set forth in Figure 1. Drug release rate from ethylcellulose pellets (prepared at 105°C) is significantly slower than that from Eudragit RSPO pellets (prepared at 85 °C).
  • Ex.3 The excipients used in Ex. 2 were employed to make morphine sulfate controlled release pellets.
  • composition Amt. (mg. prr Capsule
  • the drug release rate of Example 3 was slower than expected especially during later hours of the dissolution
  • Eudragit L-100 were incorporated in the formulation.
  • the drug dissolution rate increases with increasing amount of Eudragit L-100 in the formulation.
  • the mo ⁇ hine sulfate capsule formulation are set forth in tables 4-6 below:
  • Example 6 The formulation of Example 6 was prepared as follows:
  • the twin screw extruder is consisted of a pair of counterrotating screws and a barrel block equipped with heating/cooling zones.
  • the extrudate is delivered to a pelletizer through a conveyor belt and cut into pellets of the desirable size.
  • the extrudate is congealed and hardened while being delivered to the pelletizer on the conveyor belt.
  • the roller knife of the pelletizer cuts the strands into pellets of 1.5 mm in diameter and 1.5 mm in length.
  • Example 6 The capsules of Example 6 were found to have the following dissolution results:
  • Oxycodone HCL 20 25 Eudragit RSPO 36 45 Eudragit L-100 6 7.5 Stearic Acid 18 22.5
  • Oxycodone HCl once-a-day capsules were produced with the following formula using the technology described in Example 6. The formulation is set forth in Table 13 below.
  • pellet manufacturing procedure is the same as described in Example 6 However, 80 mg of pellets were encapsulated to contain 20 mg of oxycodone HCL
  • pellet manufacturing procedure is the same as described in Example 6. However, pellets of 1.0 mm in diameter and 1.0 mm in length were prepared. Each capsule holds 80 mg of pellets and contains 8 mg of hydromo ⁇ hone HCL.
  • Hydromorphone HCL 8 10 Eudragit RSPO 41.5 51.9 Eudragit L-100 8.5 10.6 Stearic Acid 22 27.5
  • the formulation is an ideal candidate for an extended release or once-a-day product without a food effect.
  • a bioavailability study of oxycodone capsules of examples 1 1 and 13 was conducted in 10 normal male volunteers. Capsules of example 13 were administered either with or without food. Capsules of example 1 1 were administered without food. The study was conducted in a single dose, four-way crossover design. Blood samples were taken periodically and assayed for oxycodone concentrations using gas chromatography with mass detection (G/MS).
  • G/MS gas chromatography with mass detection
  • Example 13 fed 261 14.8 6.4
  • Example 1 1 , fasted 244 12.9 6.0
  • Example 14 fasted 422 39 3 3 1
  • Example 14 fed 416 35 3 4 8
  • a bioavailability study of hydromorphone capsules of Examples 17 and 18 was conducted using a single dose, five-way crossover study in 12 normal male volunteers The subjects received either 8 mg of Dilaudid tablet (immediate release) or 8 mg of HH-MEM capsules. Dilaudid tablets were administered after an overnight fast. MEM capsules were administered with or without food. Blood samples were taken periodically and assayed for hydromo ⁇ hone concentrations using gas chromatography with mass detection (G/MS). From the data, the following pharmacokinetic parameters were calculated.
  • Example 18 fed 20.10 0.75 2.4
  • Example 17 looks ideal.
  • the data of Example 17 is shown graphically in Figure 14 and the data of Example 18 is shown graphically in Figure 15.
  • Example 17 is an ideal product for once-a-day administration for either single dose or multiple dose administration.
  • Dilaudid tablet immediate release
  • HH-MEM immediate release
  • Dilaudid tablets were administered after an overnight fast MEM capsules were administered with or without food Venous blood samples were taken at predetermined at time points.
  • the plasma hydromorphone concentrations were quantitated using gas chromatography with mass detection (G/MS)
  • Example 18 fasted 15.83 0.52 5.6
  • a once-a-day Hydromo ⁇ hone product can be produced using other ingredients than are used for Examples 17 and 18. This data is shown graphically in Figure 17.
  • the twin screw extruder is consisted of a pair of counterrotating screws and a barrel block equipped with heating/cooling zones The stranded extrudate is congealed on a conveyor belt and cut into pellets of the desirable size.
  • the extrudate is congealed and hardened while being carried away on a conveyor belt.
  • the stranded extrudate was cut into pellets of 2 mm in diameter and 2-8 cm in length.
  • the pellets were milled into granules through a suitable screen.
  • the granulation was blended with talc and magnesium stearate.
  • the mixture was then compressed into capsule-shaped tablets.
  • the tablet was placed in a tablet sinker clip and immersed in each vessel.
  • dissolution media include pH 1.2 simulated gastric fluid (SGF) without enzyme, pH 7.5 simulated intestinal fluid (SIF) without enzyme, and pH 4 phosphate buffer.

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Abstract

L'invention concerne des formes de dosages analgésiques opioïdes orales biodisponibles à libération entretenue comprenant une pluralité de multi-particules produites par des techniques de fusion-extrusion.
PCT/US1995/014745 1994-11-04 1995-11-03 Formulations opioides administrables par voie orale et obtenues par fusion-extrusion WO1996014058A1 (fr)

Priority Applications (18)

Application Number Priority Date Filing Date Title
CA002204180A CA2204180C (fr) 1994-11-04 1995-11-03 Formulations a pouvoir therapeutique obtenues par extrusion de matiere fondue et administrables par voie orale
AT95939928T ATE257375T1 (de) 1994-11-04 1995-11-03 Schmelzextrudierte oral verabreichbare opioidformulierungen
EP95939928A EP0785775B2 (fr) 1994-11-04 1995-11-03 Formulations opioides administrables par voie orale et obtenues par fusion-extrusion
DK04012331T DK1449531T3 (da) 1994-11-04 1995-11-03 Smelteekstruderede oralt administrerbare opoiod-formuleringer
DK04012330T DK1449530T3 (da) 1994-11-04 1995-11-03 Smelteekstruderede oralt administrerbare opoidformuleringer
DK95939928.8T DK0785775T4 (da) 1994-11-04 1995-11-03 Smelteekstruderede oralt administrerbare opioid-formuleringer
JP51553796A JP3186064B2 (ja) 1994-11-04 1995-11-03 溶融押出しによる経口投与可能なオピオイド製剤
DK06123277T DK1741426T3 (da) 1994-11-04 1995-11-03 Smelteekstruderede oralt administrerbare hydromorphonformuleringer
AU41570/96A AU705894B2 (en) 1994-11-04 1995-11-03 Melt-extruded orally administrable opioid formulations
KR1019970702984A KR100232945B1 (ko) 1994-11-04 1995-11-03 용융-압출된 경구 투여용 오피오이드 제형
DE69532415T DE69532415T3 (de) 1994-11-04 1995-11-03 Schmelzextrudierte oral verabreichbare opioidformulierungen
US08/833,948 US5958452A (en) 1994-11-04 1997-04-10 Extruded orally administrable opioid formulations
US09/360,056 US6261599B1 (en) 1994-11-04 1999-07-23 Melt-extruded orally administrable opioid formulations
US09/777,616 US6743442B2 (en) 1994-11-04 2001-02-06 Melt-extruded orally administrable opioid formulations
US10/242,174 US20030190358A1 (en) 1994-11-04 2002-09-12 Sustained release hydromorphone formulations exhibiting bimodal characteristics
US10/664,602 US20050089568A1 (en) 1994-11-04 2003-09-16 Melt-extruded orally administrable opioid formulations
US10/690,389 US20040081694A1 (en) 1994-11-04 2003-10-21 Melt-extruded orally administrable opioid formulations
US12/722,974 US20100172974A1 (en) 1994-11-04 2010-03-12 Melt-extruded orally administrable opioid formulations

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US08/334,209 US5965161A (en) 1994-11-04 1994-11-04 Extruded multi-particulates
US08/334,209 1994-11-04

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US10/690,389 Continuation-In-Part US20040081694A1 (en) 1994-11-04 2003-10-21 Melt-extruded orally administrable opioid formulations

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AT (5) ATE357909T1 (fr)
AU (1) AU705894B2 (fr)
CA (1) CA2204180C (fr)
DE (5) DE69535426T2 (fr)
DK (5) DK1741426T3 (fr)
ES (5) ES2308675T3 (fr)
HK (3) HK1059887A1 (fr)
HU (1) HUT77626A (fr)
IL (5) IL115871A (fr)
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